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18599 (1998 BK8)
Classification: Main-belt Asteroid          SPK-ID: 2018599
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09786839858367143 4.7066e-08  
a 2.280857185162706 6.5211e-09 au
q 2.057633345052771 1.0626e-07 au
i 3.560672286475671 2.8296e-06 deg
node 84.39068827535665 7.7157e-05 deg
peri 98.99473855641061 7.8295e-05 deg
M 134.9751248991189 1.4546e-05 deg
tp 2458528.766407712575
(2019-Feb-14.26640771)
5.046e-05 TDB
period 1258.188079843603
3.44
5.3958e-06
1.477e-08
d
yr
n .2861257436525301 1.2271e-09 deg/d
Q 2.50408102527264 7.1593e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1659  
   data-arc span      9327 days (25.54 yr)  
   first obs. used      1995-05-05  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48391  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:08:32  

Additional Information
 Earth MOID = 1.06313 au 
 Jupiter MOID = 2.45587 au 
 T_jup = 3.597 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457434.5 (2016-Feb-16.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09733297273904142 4.7085e-08  
q 2.058661979620854 1.0618e-07 au
tp 2457269.295288211309
(2015-Sep-03.79528821)
5.0125e-05 TDB
node 84.40414249467159 7.7132e-05 deg
peri 98.70266018565925 7.8288e-05 deg
i 3.561376171482602 2.8311e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1659  
   data-arc span      9327 days (25.54 yr)  
   first obs. used      1995-05-05  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48391  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:08:32  

Additional Information
 Jupiter MOID = 2.45587 au 
 T_jup = 3.597 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.216962522657356E-15 -4.992024931951121E-15 3.146040922517553E-13 -4.184814570432863E-14 1.189877804034571E-13 1.002192573242505E-15
q -4.992024931951121E-15 1.127330404889561E-14 -6.954775324768858E-13 9.471193377707452E-14 -2.643287322543087E-13 -2.228322814984392E-15
tp 3.146040922517553E-13 -6.954775324768858E-13 2.512538104802376E-9 -2.908701809360121E-12 7.045773870555244E-10 -2.946839967409785E-13
node -4.184814570432863E-14 9.471193377707452E-14 -2.908701809360121E-12 5.949299959604493E-9 -5.93823347567125E-9 -5.745769089316736E-11
peri 1.189877804034571E-13 -2.643287322543087E-13 7.045773870555244E-10 -5.93823347567125E-9 6.129088937996506E-9 5.725824494665654E-11
i 1.002192573242505E-15 -2.228322814984392E-15 -2.946839967409785E-13 -5.745769089316736E-11 5.725824494665654E-11 8.015040172961839E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO337415  
diameter diameter 2.814 km 0.838 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.644 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.169   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18599 (1998 BK8)          Discovered 1998-Jan-25 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 BK8 = 1995 JR1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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